Chlamydia positive indicates the presence of chlamydial infection in the body. Chlamydia infections are divided into Chlamydia pneumoniae and Chlamydia trachomatis, due to different pathogen typing, Chlamydia invasion of organs and tissues, its clinical manifestations, transmission channels are also different, as follows: 1, Chlamydia pneumoniae: invasion of the lungs, bronchi, pharynx, etc., often cause pneumonia, can also cause bronchitis, pharyngitis, symptoms to respiratory symptoms, its transmission channels are mainly through respiratory droplet transmission, saliva transmission; 2, Chlamydia trachomatis: involving the eyes, genitourinary system, can cause trachoma, inclusion body conjunctivitis, bladder 2, Chlamydia trachomatis: involving the eyes, genitourinary system, can cause trachoma, inclusion body conjunctivitis, cystitis, urethritis and inflammation of reproductive organs, its mode of transmission is eye – hand – eye contact transmission, but also through sexual transmission.